Fix typo in an OID name

fixes #314
diff --git a/ChangeLog b/ChangeLog
index 71fdd7b..5af1609 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -9,6 +9,7 @@
      exchange. Found and fix provided by Chris Hammond. #270
    * Fix failures in MPI on Sparc(64) due to use of bad assembly code.
      Found by Kurt Danielson. #292
+   * Fix typo in name of the extKeyUsage OID. Found by inestlerode, #314
 
 = mbed TLS 1.3.14 released 2015-10-06